Chest, weather, crash, and miscellaneous fixes (#5215)

* Alpha-sort cChestEntity

* Chests: use SendUpdateBlockEntity

* Pathfinder: fix out of range Y

* 1.13: correct weather packet ID

* Chests: fix neighbour scanner

+ Add OnAddToWorld and overload to scan neighbours there, instead of in the constructor/OnUse. This fixes hoppers accessing newly loaded double chests and seeing a null m_Neighbour, thus thinking its a single chest.
* Fix typo in cross coords computation.
* Simplify hopper logic.

* Block entities: ASSERT that type is correct

If you match the block type first before calling DoWithBlockEntity, the corresponding block entity must either be empty or correspond to the block type.

* Chunk: fix some forgotten PendingSendBE cleanup

+ Add cleanup in SetAllData, WriteBlockArea
- Remove RemoveBlockEntity (used once), HasBlockEntity (not used)

* Replace MakeIndex with MakeIndexNoCheck

* Remove extraneous MarkDirty in hopper & chests

src/ChunkData.cpp

@@ -26,7 +26,7 @@ namespace
 		return
 		{
 			static_cast<size_t>(a_RelPos.y / cChunkDef::SectionHeight),
-			static_cast<size_t>(cChunkDef::MakeIndexNoCheck(a_RelPos.x, a_RelPos.y % cChunkDef::SectionHeight, a_RelPos.z))
+			cChunkDef::MakeIndex(a_RelPos.x, a_RelPos.y % cChunkDef::SectionHeight, a_RelPos.z)
 		};
 	}